macOS unenrolled, but software updates still enforced

Hey all,

I have enrolled and unenrolled a privately owned MacBook Pro M1. However I still get managed software update notifications, see screen shot.

In English, this says "required managed update. unit must be charged at least 50% or connected to mains. 

The unit will be restarted to apply the update. You can cancel this update 4 more times before it will be installed automatically.

This is a huge issue for me because I don't want to update to macOS 26 at this time.

I unenrolled the MacBook from the company portal. It no longer appears in the list of managed devices.

On the unit, under Settings, Device management, the profile list is empty:

I don't know how to troubleshoot further. I would be very grateful to anyone who could point me to some next steps to try.

Thank you

Selwin Kadijk